I am unsure if I have a drug interaction?

I am unsure if I have a drug interaction or if I have new manifestations of A-fib symptoms.

I had an ischemic stoke in April and was diagnosed with A-fib. Just before that my Dr. put me on Zoloft (a change from Celexa). Here's the timeline.March 15 started ZoloftApril 20 my first episode (details below)April 29 stroke (minor & recovered)May 6 put on EliquisSince then I have had 3 more episodes.